What are the common diseases and insect pests of Tianqi? What should be paid attention to in planting?

Tianqi is a common Chinese herbal medicine, which has the effects of stopping bleeding and dispelling blood stasis, reducing swelling and relieving pain, and is a very high-quality blood-tonifying medicine, so what are the common diseases and insect pests of Tianqi? What should be paid attention to in planting? Let's take a look at it.

1. Common diseases and insect pests of Tianqi

1. Blight disease

Rhizoctonia solani is the most common disease of Tianqi, it is a kind of fungal disease, which mainly harms seeds, buds and seedlings, seeds will rot and flow out milky serous, while seed buds will be dark brown until death; seedling damage is that dark gray sunken disease spots will appear at the base of the stem, until the later stage of the disease will lead to seedling death.

Control methods: carbendazim can be used to disinfect the soil before sowing, and the seeds should also be disinfected. When diseased plants are found, they can be pulled out and taken out of the field in time. Then sprinkle lime powder around the disease point, and fully spray methyl topiramate, which can effectively prevent the disease from spreading.

two。 Root rot disease

It is also a fungal disease, it mainly harms the root system of the plant, the root will appear black-brown disease spot, and will gradually extend upward along the root system, in the humid environment, the base of the stem will gradually soft rot, accompanied by stench, and the plant will gradually die.

Prevention and treatment methods: select the land with good drainage, pay attention to drainage during the rainy season, select varieties with strong disease resistance, pull out the diseased plants and take them out of the field in time, and then disinfect the disease holes with lime powder, and you can also irrigate the roots with carbendazim at the initial stage of the disease. the effect is better.

3. Epidemic disease

It is also a fungal disease, which mainly harms the aboveground parts of the plant. When the disease occurs, the leaf chooses the yellow-brown spot, and the spot has obvious brown edge. In the later stage of the disease, the spot will appear black spots, which can easily lead to leaf perforation; the fruit will appear slightly concave brown spots; the stem will appear sunken yellow-brown ribs.

Control methods: clear the garden comprehensively, burn the dead branches and leaves in time, select seven kinds of seedlings without disease, soak them with Bordeaux solution for a period of time before transplanting, and spray with Dysen zinc or bacilli when the disease occurs, once every other week, 2-3 times in a row.

4. Insect pest

The main pests of Tianqi are mites, aphids, ground tigers and other underground pests, which mainly harm leaves and roots, affect the normal growth of plants, and die in serious cases.

Control methods: turn the soil deeply when planting, kill overwintering pests, serious pests can be controlled with dimethoate emulsion, but pay attention to the concentration, so as not to affect the growth of Tianqi.

II. Matters needing attention in planting Tianqi

1. Growing environment

Tianqi is a shade-loving plant, likes warm winter and cool summer environment, afraid of cold and hot climate, likes humid environment, but afraid of stagnant water, the suitable soil water content is between 20% and 40%. Pay attention to the change of temperature when planting, it should not be higher than 35 degrees in summer, once the temperature is too high, it will grow slowly or stagnant, and if it is heavy, it will die; and in winter, the temperature must not be lower than minus 5 degrees, otherwise it will produce frost damage, and grow best in an environment of 18-25 degrees.

two。 Soil preparation and fertilization

Tianqi has loose requirements for soil and strong adaptability, but it is suitable for loose, fertile and well-drained sandy loam, and should not be planted on land with heavy stickiness and low-lying water. At the same time, continuous cropping should be avoided, and the pH value of soil should be between 4.5 and 8. In order to promote the growth and development of Tianqi root system, the soil should be deeply turned over before planting, and the yield of soil sterilization should be carried out. At the same time, 5000 kg of fully mature farm manure per mu should be applied as base fertilizer to maintain soil fertility.

3. Seedling stage management

Seedling management needs to pay attention to water management and weeding work. When the climate is dry, an appropriate amount of watering should be increased, usually once a week, while in case of rainy weather, the amount should be reduced. At the same time, we should also pay attention to the situation of stagnant water in the field, drainage and dampness, so as to avoid rotting roots. Then there is regular weeding, in order to avoid Tian Qi being hurt, it is best to choose artificial weeding, not to use pesticides, so as not to cause drug residues and affect the yield.